Nut-wrench



0. H, LAMBKIN.

NUT WRENCH.

(No Model.)

No. 587,006. Patented July 27, 1897.

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UNITED STATES ATEN'I rricn.

- CHARLES H. LAMBKIN, on MOUNT VERNON, NEW YORK.

NUT-WRENCH.

SPECIFICATION forming part of Letters Patent No. 587,006, dated July 27, 1897.

Application filed October 9, 1896.

To all whom, it may concern.-

Be it known that I, CHARLES H. LAMBKIN,

a citizen of the United States of America, and

- the ordinary ratchet-wrench, but made without ratcliets or springs.

The nature of my invention will best be understood when described in connection with the accompanying drawings, in which- Figure 1 represents a face view of a wrench embodying my invention, one of the jaws being removed and part of the casing broken away. Fig. 2 is a section 011 the line 2 2, Fig. 1. Fig. 3 is a side view of the wrench-head. Fig. 4 is a top view with the operating-nut removed. Fig. 5 is a central section through the head. I

Similar letters and numerals of reference designate corresponding parts throughout the several views of the drawings.

Referring to the drawings, the letter A designates the jaw-head, containing an annular jaw-holder B, to which are connected the two jaws a a. The jaw-holder is provided with a reduced portion or shank 1, which is threaded and engaged by an operating-nut O. Said nut is formed with a peripheral guide 2, fittinginto a semicircular way 3, formed at the top of the head. The larger portion or body 4 of the jaw-holder is fitted to the bore of the head. and is slotted, as at 5 5. Into these slots project inclines 6 6, which serve both to support and guide the jaws a and to prevent the jaw-holder from rotating. Said inclines are placed diametrically opposite to each other in the head A and may be made integral with the same.

In the j aw-holder is formed a transverse or diametrically-extending guideway 7, which receives the upper headed ends 8 of the jaws a. The lower or gripping portions of the jaws are provided with inclined guides 9,

Serial No. 608,351. (No model.)

support the jaws at their upper ends, and said inclines have the same inclination'as the inclined ways 10. A third set of diametrically opposite inclines Z) guide the backs of the lower portion of the jaws. Said inclines b are directly adjacent to the inclined ways 10,

and in fact form a continuation of the same.

(See Fig. 1.) Thematerial of the head is removed between said inclines b to permit the insertion of the jaws from below. It is now evident that if the operating-n ut O is turned the jaw-holder B will be raised or lowered,

and consequently the jaws will be opened or closed, in view of the inclined guides 9 and ways 10, while the remaining inclines serve as additional means for guidance and support. The shoulder c, Fig. 5, formed on the jaw-holder, acts as a stop to prevent thejaws from being drawn in too far.

To avoid the use of ratchet-teeth and pawls and to provide a very quick acting or sensitive handle, I turn a groove 11 into the outer periphery of the head A, into which is fitted a steel strap S, which is opened and closed by means of the handles H and H. In the present instance I have shown the ends of the strap crossed and attached at 13 13 to the ends of the respective handles.

The handles are pivoted at 14 14 to a casing I, and intermediate of the same is arranged a block or bearing 15, Fig. 1, rigidly affixed to the casing. -On the casing is also formed or affixed an abutment cl, having its surface concentric with the head. If by means of the handle H the wrench is moved in the .direction of arrow 1, Fig. 1, the strap is drawn about the head and the head is drawn against the abutment cl, whereby said head is prevented from turning. The block or bearing 15 prevents retrograde motion of the handle H, as the end of the same is between the fulcrum of said handle and the connection 13. If by means of the handle 11 the wrench is turned in the direction of arrow 2, the head is gripped and turned as before. The head is loosened by pressing either of the handles outwardly.

It is of course to be understood that the block or bearing 15 may be replaced by suitably-located pins or stops.

What I claim as new is-- 1. In a nut-wrench, the combination of a head revolubly supported, two pivoted handles, and a cross-strap encompassing the head and attached at opposite ends to said handles, substantially as described.

2. In a nut -wrench, the combination of a head revolubly su pported,two handles,a strap encompassing the head and attached at opposite ends to said handles, and means for preventing retrograde turning of the handles, substantially as described.

3. In a nut-wrench, the combination of a head revolubly supported, two handles, a strap encompassing the head and attached at 0ppositc ends to said handles, and a block or bearing intermediate of the handles for preventing retrograde turning of the sa1nc,sub stantially as described.

4:. In a nut-wrench, the combination of a head revolubly supported,two handles, a strap encompassing the head and attached at 0pposite ends to said handles, and an abutment arranged adjacent to the head, substantially as described.

5. In a nut-wrench, the combination of a revoluble head provided with inclined ways, a j aw-holder mounted to reciprocate in said head and provided with a transverse way and with a threaded shank, jaws provided with inclined guides fitted to the inclined ways in the head and with flanges or heads fitted to the transverse way of the jaw-holder, and an operating-nut engaging the threaded shank of the jaw-holder, substantially as described.

6. In a nut-wrench, the combination of a revoluble head provided with inclined ways, a jaw holder slotted. longitudinally and mounted to reciprocate in said head; said jawholder being provided with a transverse way and with a threaded shank, jaws provided with inclined guides fitted to the ways in the head and with flanges or heads fitted to the transverse way of the jaw-holder, inclines 6 attached to the head and entering the slots in the j aw-holder and an operating-nut engaging the threaded shank of the jaw-holder, substantially as described.

7. In a nut-wrench, the combination of a revoluble head provided with inclined ways, inclines 6 formed on said head for guiding and supporting the upper ends of the jaws, a jaw-holder mounted to reciprocate in said head and provided with a transverse Way and with a threaded shank, jaws provided with inclined guides fitted to the ways in the head and with flanges or heads fitted to the transverse way of the jaw-holder,and an operatingnut engaging the threaded shank of the jawholder,substantially as described.

8. In a nut-wrench, the combination of a revoluble head provided with inclined ways, in clines- Z) and 0 formed on said head for guiding and supporting respectively the backs and heads of the jaws, a jawholder mounted to reciprocate in said head and provided with a transverse way and with a threaded shank, jaws provided with inclined guides fitted to the ways in the head and with flanges or heads fitted to the transverse way of the j aw-holder, and an operating-nut engaging the threaded shank of the jaw-holder, substantially as described.

In testimony that I claim the foregoing as myinvention I have signed my name, in presence of two witnesses, this 16th day of September, 1696.

C. II. LAHBKIN.

Witnesses:

A. FABER DU FAUR, Jr., ISAAC RoTHsoHILD. 

